Aproposed block cipher system based on three-dimensional

مقدم أطروحة جامعية

al-Lezzani, Abd al-Wase Muhammad Ubayd

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم علوم الحاسوب

دولة الجامعة

العراق

الدرجة العلمية

دكتوراه

تاريخ الدرجة العلمية

2004

الملخص الإنجليزي

Cryptography process is considered to be the main basis for preserving the data security and integrity, via transmission through the modem communication media between people. The power of cryptography system is mainly based on the possibility generation of sequence numbers to be real randomness, that is to say an attempt to construct and design a system to generate random numbers of high quality, which represent the cryptosystem key. In this thesis we present a new technique to generate a high-quality Pseudorandom numbers (PRNs) by applying three-dimensional cellular automata (3-D CA), whereas the updating process for CA is based upon the neighbor cells and the selected rules for application in the calculating of the next state for CA.

There is a huge search space of the rules, that can be applied in the process of calculating the next state of CA and for choosing the rules that will be applied to updating the values of the cells of 3 -D C A. Thus the cellular programming (CP).technique were applied, which gives us a group of rules, whereas the 5-neighbor or more was selected to be used in updating the 3-D CA cells values,, in order to acquire high-quality random number generation. A group of statistical tests was applied to examining the high-quality random number generation-by applying the chosen rules.

Thereby we found out that we have acquired random numbers of high-quality CA random number generators (RNGs). Accordingly, and as a consequence of that a symmetric block cryptosystem was designed and built by applying nonuniform 3-D CA, as well as a nonuniform one was designed and built by using a reversible 3-D CA.

التخصصات الرئيسية

تكنولوجيا المعلومات وعلم الحاسوب

الموضوعات

• التشفير
• البيانات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-305743